Sectional furnace roof



Jan. 2, 11923. 1,44%468 A. L. KANAGY ET AL.

SECTION/1L FURNACE ROOF,

Fl LED JUNE 14, 1 922. 2 SHEETS-SHEET 2 [w yewwasa- AZ S.

' oven type.

Patented Jan. 2, 1223.

tatterernnr ntros.

ABRAHAM L. KANAGY sno'rroner. FURNACE noon.

Application filed June 14, 1922. Serial No. 568,243.

To all whom it may concern:

Be it known that .we, ABRAHAM L. KANAGY and WALTER H. COTTON, citizens of the United States, and residents of Chicago,

county of Cook, and State of Illinois, have jointly invented certain new and useful Tmprovements in Sectional Furnace Roofs, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to brick furnaceroofs, and particularly to that class of furnace used for melting metals, such as the malleable iron and open hearth types.

The invention is also particularly adaptable to boiler arches where the trusses are not exposed to the fire, such as in the Dutch The objects of the invention are to providearoof of increased stability relative to collapse; to provide easy means for repairs while the furnace is. in operation; to provide simpleand inexpensive ineans for supportmg the fire brick; and to provide-easy means for reloading with brick.

The invention is illustrated in the accom panying drawings, in which I Fig. 1 is a side view of the root section and setting as usually applied to malleable iron turnaces;

Fig. 2 is a plan;

Fig. 3 is an elevation of three sections showing one in end elevation and two in cross-section on line 3-3 of Fig. 1;

Fig. i is a side elevation of a modification of a root section, showing the structure flat instead of bowed;

a Fig. 5 is-a plan view of a fragmentot the structure shown in Fig. 4a

Fig. 6 is a sectional elevation of two sections on line 6-6 of Fig. 4, one of the sections being shown with a repair brick;

Fig. 7 'is a plan view ofa fragment of the truss showing brick supporting ledges and onemethod of inserting brick; and

Fig. 8 is a perspective view of the brick.

In the drawing numeral 10 generally.

designates a truss which consists of two beams 11 and 12, 0t suficient length to span the side walls 13 of the furnace. Ledges 14 .and 15, extending inwardly from the beams 11 and 12, and spacing members 16 are permanently secured to ets 17, and are removably secured to beam 12,

thebeam 11, as by rive AND WALTER H. COTTON, OF CHICAGO, ILLINOIS.

eEflSeuEn are each provided with an eye so as to facilitate the withdrawal from the roof of a section by means of a crane, as is the usual practice in charging metal treating furnaces.

The brick 19 (Fig. 8) in sections of the bowed or spring a type of roof are made slightly/tapered on the side, as 20, 21,to conform to the curvature of the roof, while in the flat roof the sides are parallel. The top of each brick is of dove-tail configuration, the sockets 22 and 23 being complementary in form to the ledges 14,15, of the beams 11 and 12, which are so spaced that the dove-tailed ends of the brick may he slid into place, the ledges loosely fitting. the sockets 22and 23.

The brick may be placed in the truss by inserting the dove-tailed head through a passage on each end, asshown by dotted lines in Fig. 7, and sliding into the ledges to the hold the beams rigidly to the spacing members. g

It is desirable that the brick at each end of each section rest upon the side walls of the furnace so there may be as little resist ance to the expansion. of the brick, due to the heat, as possible. g

brick 24 set upon a re- The Tn Fig. 4 the end cess at the top of the sidewalls 13. pocket 25 between the extension of the side walls and brick may be filled with fire clay to insure a perfect seal.

Should any of the brick fall the cavity may be quickly closed by inserting the repair brick shown 1n. one of the sections of Fig. 6, or by sliding the adjacent brick to close the cavity and inserting a new one at the end for the abutment.

We claim asour invention 1. In a furnace root, in combination, a plurality of sections each consisting of a pair of beams having projecting ledges, a plurality ofbrick having projections complenientary to and resting on said ledges,

spacing bars rigidly secured to the beamsand adapted to hol d same in parallel relation, and a plurality of brick suspended from the ledges.

3. In a sectional furnace roof, a section consisting of a pair of beams rigidly secured nent at "each end for the entire section to rest upon.

at. The combination in a sectional furnace roof, of a. pair of beams, a plurality of brick having dove-tailed engagement with the beams, a" plurality of spacing bars for holding the beams in parallel relation, and means for'spreadingthe beams for the purpose set forth. i K 5. 'In a sectional-furnace roof, in combination, a truss'consisting of a pair of beams spaced apart and held in parallel relation, brick holding ledges on the beams, a plurality of brick, and means for *placing the bfick in proper position on the ledges.

6. 'lllhe combination in a sectional furnace .wardly projecting ledge terminating short of the ends of the beams, and a plurality of aving dovetailed 'ehgagebrick having project-ions complementary to and adapted to be slid into. position upon said ledges.

8. In a sectional furnace roof, a section consisting of a pair of parallel beams each having an inwardly projecting ledge, the ledges terminating short'of the ends of the beams, and a. plurality of brick suspended from the ledges.

9. In afurnace roof, ill combination, a pair of beams each having an inwardly projecting ledge, a repair brick comprising two, 'vert-ical halves each half having a projection complementary to and adapted to restupon one of said ledges, and a vertical key adapted to fit between said halves.

' ABRAHAM L. KANAGY. WALTER H. corrou. 

